lib: percpu_count_sum()

Provide an accurate version of percpu_counter_read.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 3 insertions, 3 deletions

diff --git a/lib/percpu_counter.c b/lib/percpu_counter.c
index b0d80ea22a33..3b0ed80c1efd 100644
--- a/lib/percpu_counter.c
+++ b/lib/percpu_counter.c
@@ -52,7 +52,7 @@ EXPORT_SYMBOL(__percpu_counter_add);
  * Add up all the per-cpu counts, return the result.  This is a more accurate
  * but much slower version of percpu_counter_read_positive()
  */
-s64 percpu_counter_sum_positive(struct percpu_counter *fbc)
+s64 __percpu_counter_sum(struct percpu_counter *fbc)
 {
         s64 ret;
         int cpu;
@@ -64,9 +64,9 @@ s64 percpu_counter_sum_positive(struct percpu_counter *fbc)
                 ret += *pcount;
         }
         spin_unlock(&fbc->lock);
-        return ret < 0 ? 0 : ret;
+        return ret;
 }
-EXPORT_SYMBOL(percpu_counter_sum_positive);
+EXPORT_SYMBOL(__percpu_counter_sum);
 
 void percpu_counter_init(struct percpu_counter *fbc, s64 amount)
 {